SiteMeter

SiteMeter offers comprehensive real-time web site tracking and counter tools with detailed reports of who is visiting your site, how they found you, where they came from and what interests them. InternetAdSales uses the free tool and recommend it others seeking a solid, free counter and web traffic tracking system.

From the website:

SiteMeter is a free, fast, and easy way to add a web counter to your web page. Not only can it display the number of visitors to your web site, it also keeps statistics on the number of visits each hour and every day. It also provides detailed information about these visitors. These statistics are provided in real time so they are always up-to-date.

Note: There is a Premium account with additional tracking available for $6.95/month or $59/year.

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